/* 收叮下载站 · 样式（移动优先，断点 480 / 768 / 1024 / 1440） */

:root {
  --bg: #F6F7F5;
  --card: #FFFFFF;
  --line: #E6E7E4;
  --line-2: #F0F1EE;
  --ink: #16181C;
  --ink-2: #3C4048;
  --muted: #6B7280;
  --faint: #9AA0A6;
  --green: #07C160;
  --green-deep: #0F7B5F;
  --green-soft: #E7F3EE;
  --green-line: #BFDDD3;
  --amber: #8A4B06;
  --amber-soft: #FDF3E3;
  --amber-line: #F2DDBB;
  --blue: #1677FF;
  --danger: #B42318;
  --btn-bg: #0F7B5F;
  --btn-ink: #FFFFFF;
  --radius-s: 12px;
  --radius-m: 18px;
  --radius-l: 24px;
  --shadow: 0 8px 30px rgba(16, 24, 20, .06);
  --nav-bg: rgba(246, 247, 245, .88);
  --maxw: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #17171A;
    --line: #26262A;
    --line-2: #1F1F23;
    --ink: #FFFFFF;
    --ink-2: #D5D5DA;
    --muted: #8A8A93;
    --faint: #5C5C64;
    --green-deep: #07C160;
    --green-soft: #0B2E19;
    --green-line: #14532D;
    --amber: #F0C48A;
    --amber-soft: #2A1F10;
    --amber-line: #4A3720;
    --btn-bg: #07C160;
    --btn-ink: #062414;
    --shadow: 0 8px 30px rgba(0, 0, 0, .5);
    --nav-bg: rgba(0, 0, 0, .8);
  }
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

/* .btn 等自带 display，会盖掉 hidden 属性的 UA 样式，必须显式兜底 */
[hidden] { display: none !important; }
h1, h2, h3 { letter-spacing: -.02em; }
p { overflow-wrap: anywhere; }

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 16px;
}

section[id] { scroll-margin-top: 76px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--nav-bg);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 60px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 700;
  min-height: 44px;
}

.nav-brand img { width: 28px; height: 28px; border-radius: 8px; }

.nav-links {
  display: none;
  gap: 28px;
  margin-left: 12px;
  font-size: 14.5px;
  color: var(--muted);
}

.nav-links a { min-height: 44px; display: inline-flex; align-items: center; }
.nav-links a:hover { color: var(--ink); }

.nav .btn { margin-left: auto; }

/* 移动端放不下 nav-links，单独给「使用说明」一个入口 */
.nav-help {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.nav-help:hover { color: var(--ink); }

@media (max-width: 767px) {
  .nav-help { margin-left: auto; }
  .nav .btn { margin-left: 0; }
}

/* ---------- 微信提示条 ---------- */
.wx-tip {
  display: none;
  position: relative;
  padding: 10px 44px 10px 16px;
  background: var(--amber-soft);
  border-bottom: 1px solid var(--amber-line);
  color: var(--amber);
  font-size: 13.5px;
  line-height: 1.6;
}

.wx-tip.on { display: block; }

.wx-tip b { font-weight: 700; }

.wx-tip-close {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 32px;
  height: 32px;
  border: 0;
  background: transparent;
  color: var(--amber);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 14px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .12s ease, opacity .12s ease, background .12s ease;
}

.btn:active { transform: scale(.985); }

.btn-primary {
  background: var(--btn-bg);
  color: var(--btn-ink);
  box-shadow: 0 6px 18px rgba(15, 123, 95, .18);
}

.btn-ghost {
  background: var(--card);
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover { border-color: var(--green-line); color: var(--green-deep); }

.btn.is-disabled {
  background: var(--line-2);
  color: var(--faint);
  box-shadow: none;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-sm { min-height: 44px; padding: 0 16px; font-size: 14px; border-radius: 12px; }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  gap: 32px;
  padding: 36px 0 12px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(28px, 6.5vw, 52px);
  line-height: 1.18;
  font-weight: 800;
}

.hero-sub {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.72;
}

.hero-cta { display: grid; gap: 10px; }

.hero-cta .btn { width: 100%; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-top: 16px;
  color: var(--faint);
  font-size: 13px;
}

.hero-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13.5px;
}

/* 样机占位：换成真实截图时把 .device-screen 内容替换为 <img> */
.hero-visual { display: flex; justify-content: center; }

.device {
  width: min(272px, 74vw);
  /* 与截图 1080x1920 一致，避免裁掉底部导航 */
  aspect-ratio: 9 / 16;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 34px;
  background: var(--card);
  box-shadow: var(--shadow);
}

.device-screen {
  display: grid;
  place-items: center;
  height: 100%;
  padding: 0;
  overflow: hidden;
  border-radius: 26px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 13px;
  line-height: 1.6;
  text-align: center;
}

/* 截图铺满样机屏幕，裁掉上下溢出的部分 */
.device-screen img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: top center; }

.device-screen small { display: block; margin-top: 6px; color: var(--faint); font-size: 11.5px; }

/* ---------- 平台适配条 ---------- */
.chips {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 18px 0 0;
  overflow-x: auto;
  list-style: none;
  scrollbar-width: none;
}

.chips::-webkit-scrollbar { display: none; }

.chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.chip.ok { background: var(--green-soft); border-color: var(--green-line); color: var(--green-deep); font-weight: 600; }
.chip.no { color: var(--faint); }

/* ---------- 通用区块 ---------- */
.sec { padding: 48px 0 0; }

.sec-h {
  margin: 0 0 8px;
  font-size: clamp(22px, 4.2vw, 34px);
  font-weight: 800;
  line-height: 1.3;
}

.sec-sub { margin: 0 0 26px; color: var(--muted); font-size: 15px; }

/* ---------- 功能卡 ---------- */
.cards { display: grid; gap: 14px; }

.card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--card);
}

.card h3 { margin: 12px 0 6px; font-size: 16.5px; font-weight: 700; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.65; }

.ico {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--green-soft);
  color: var(--green-deep);
}

.ico svg { width: 21px; height: 21px; }

/* ---------- 三步上手 ---------- */
/* 视频号入口：首页三步区块上方的一条提示 */
.video-tip {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--card);
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.6;
}

.video-tip img { flex: 0 0 auto; width: 56px; height: 56px; border-radius: 10px; object-fit: cover; }
.video-tip b { display: block; margin-bottom: 2px; color: var(--ink); font-weight: 600; }

/* 使用说明页顶部的视频号卡片 */
.doc-video {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 0 0 24px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--card);
}

.doc-video img { flex: 0 0 auto; width: 108px; height: 108px; border-radius: 12px; object-fit: cover; }
.doc-video h3 { margin: 0 0 4px; font-size: 15px; }
.doc-video p { margin: 0; }
.doc-video-links { display: flex; flex-wrap: wrap; gap: 14px; margin: 8px 0 0; }

.steps { display: grid; gap: 16px; counter-reset: step; }

.step {
  position: relative;
  display: grid;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--card);
}

.step h3 { margin: 0; font-size: 16px; font-weight: 700; }
.step p { margin: 6px 0 0; color: var(--muted); font-size: 14.5px; }

.step-no {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 700;
}

/* 截图占位：替换为 <img src="assets/screens/xxx.webp" alt="..."> 即可 */
.shot {
  display: grid;
  place-items: center;
  aspect-ratio: 9 / 16;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--line-2);
  color: var(--faint);
  font-size: 12.5px;
  line-height: 1.5;
  text-align: center;
}

.shot img { display: block; width: 100%; height: 100%; object-fit: cover; }

/* ---------- 大屏 ---------- */
.split { display: grid; gap: 20px; }
.split .shot { aspect-ratio: 16 / 10; }
.split-text p { color: var(--muted); font-size: 15px; }
.split-text ul { margin: 12px 0 0; padding-left: 20px; color: var(--muted); font-size: 14.5px; }
.split-text li { margin-bottom: 6px; }

.url-pill {
  display: inline-block;
  margin-top: 4px;
  padding: 6px 12px;
  border: 1px solid var(--green-line);
  border-radius: 10px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 13.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* 电脑大屏端下载入口 */
.split-text .btn { margin-top: 14px; }
.exe-note { margin: 8px 0 0; color: var(--faint); font-size: 12.5px; }
.dl-exe { margin-top: 14px; }

/* Win10/11 与 Win7 两个入口并排，窄屏自动换行 */
.dl-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.dl-row .btn { margin-top: 0; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 10px; }

.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--card);
  padding: 0 16px;
}

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 52px;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 18px;
  font-weight: 400;
}

.faq details[open] summary::after { content: "\2212"; }

.faq details p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.72;
}

/* ---------- 下载区 ---------- */
.dl {
  display: grid;
  gap: 22px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: var(--card);
  box-shadow: var(--shadow);
}

.dl-title { margin: 0 0 6px; font-size: clamp(19px, 3.6vw, 24px); font-weight: 800; }
.dl-desc { margin: 0 0 16px; color: var(--muted); font-size: 14.5px; }
.dl .btn { width: 100%; }
.dl-note { margin: 10px 0 0; color: var(--faint); font-size: 12.5px; min-height: 18px; }

.dl-meta {
  display: grid;
  gap: 6px;
  margin: 16px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.dl-meta code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
  color: var(--ink-2);
  overflow-wrap: anywhere;
}

.dl-side { display: grid; justify-items: center; gap: 10px; }

.qr {
  position: relative;
  display: grid;
  place-items: center;
  width: 156px;
  height: 156px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: #FFFFFF;
}

.qr img { width: 100%; height: 100%; object-fit: contain; }

.qr-hint {
  display: none;
  padding: 6px;
  color: #9AA0A6;
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
}

.qr.is-empty img { display: none; }
.qr.is-empty .qr-hint { display: block; }

.qr.pulse { animation: qr-pulse 1s ease-out 3; }

@keyframes qr-pulse {
  0% { box-shadow: 0 0 0 0 rgba(7, 193, 96, .55); }
  70% { box-shadow: 0 0 0 14px rgba(7, 193, 96, 0); }
  100% { box-shadow: 0 0 0 0 rgba(7, 193, 96, 0); }
}

.qr-cap { color: var(--muted); font-size: 12.5px; text-align: center; }

.changelog { margin: 18px 0 0; padding: 0; list-style: none; }
.changelog li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13.5px;
}
.changelog li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: .68em;
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: var(--green);
}

/* ---------- 页脚 ---------- */
.foot {
  margin-top: 56px;
  padding: 32px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13.5px;
}

.foot-grid { display: grid; gap: 26px; }

.foot h4 { margin: 0 0 8px; color: var(--ink); font-size: 14px; }
.foot p { margin: 0 0 8px; }
.foot a { color: var(--muted); }
.foot a:hover { color: var(--green-deep); }

.foot-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }

.kefu {
  display: flex;
  align-items: center;
  gap: 12px;
}

.kefu img {
  width: 96px;
  height: 96px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #FFFFFF;
  object-fit: contain;
  cursor: zoom-in;
}

.kefu-wx { font-size: 15px; font-weight: 700; color: var(--ink); }

.copy-btn {
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
}

.copy-btn:hover { border-color: var(--green-line); color: var(--green-deep); }

.foot-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 18px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line-2);
  color: var(--faint);
  font-size: 12.5px;
}

/* ---------- 客服码放大 ---------- */
dialog#kefu-dialog {
  padding: 0;
  border: 0;
  background: transparent;
  max-width: 92vw;
}

dialog#kefu-dialog::backdrop { background: rgba(0, 0, 0, .72); }

dialog#kefu-dialog img {
  width: min(320px, 82vw);
  border-radius: 16px;
  background: #FFFFFF;
  padding: 8px;
}

/* ---------- 断点 ---------- */
@media (min-width: 480px) {
  .wrap { padding: 0 20px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .hero-cta { display: flex; flex-wrap: wrap; }
  .hero-cta .btn { width: auto; min-width: 186px; }
}

@media (min-width: 768px) {
  .wrap { padding: 0 28px; }
  .nav-links { display: flex; }
  .nav-help { display: none; }
  .chips { justify-content: center; overflow: visible; padding-top: 24px; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .split { grid-template-columns: 1fr 1fr; align-items: center; gap: 32px; }
  .faq { grid-template-columns: 1fr 1fr; align-items: start; }
  .faq details { margin-bottom: 0; }
  .dl { grid-template-columns: 1fr auto; align-items: center; gap: 36px; padding: 30px; }
  .dl .btn { width: auto; min-width: 240px; }
  .foot-grid { grid-template-columns: 1.2fr 1fr 1fr; gap: 32px; }
  .sec { padding-top: 64px; }
}

@media (min-width: 1024px) {
  .wrap { padding: 0 32px; }
  .hero {
    grid-template-columns: 1.05fr .95fr;
    align-items: center;
    gap: 48px;
    padding: 64px 0 28px;
  }
  .hero-visual { justify-content: flex-end; }
  .device { width: 300px; }
  .cards { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .sec { padding-top: 76px; }
  .step { padding: 22px; }
}

@media (min-width: 1440px) {
  :root { --maxw: 1200px; }
}

/* ---------- 文档页（隐私政策 / 用户协议） ---------- */
.doc {
  max-width: 820px;
  margin: 0 auto;
  padding: 28px 0 0;
}

.doc h1 { margin: 0 0 6px; font-size: clamp(22px, 4vw, 30px); }
.doc .doc-meta { margin: 0 0 24px; color: var(--faint); font-size: 13px; }
.doc h2 { margin: 26px 0 8px; font-size: 17px; }
.doc p, .doc li { color: var(--muted); font-size: 14.5px; line-height: 1.8; }
.doc ul { margin: 8px 0; padding-left: 20px; }
.doc ol { margin: 8px 0; padding-left: 22px; }
.doc a { color: var(--green-deep); text-decoration: underline; text-underline-offset: 3px; }
.doc h3 { margin: 18px 0 6px; font-size: 15px; }
.doc strong { color: var(--ink); font-weight: 600; }

.doc code {
  padding: 1px 5px;
  border-radius: 6px;
  background: var(--line-2);
  color: var(--ink-2);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}

/* 使用说明里的对照表：窄屏横向滚动，不挤压正文 */
.doc-table { margin: 10px 0 14px; overflow-x: auto; }
.doc table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.doc th, .doc td {
  padding: 8px 10px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
  color: var(--muted);
}
.doc th { background: var(--line-2); color: var(--ink); font-weight: 600; white-space: nowrap; }

.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 14px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}